Monthly Temperature Data
Grand Rapids, Michigan
(July 1997 through June 2007)

Month/Year

Actual temperature

Normal temperature

Deviation from normal

July 1997  70.8  71.6  -0.8 
Aug. 1997  66.1  69.5  -3.4 
Sept. 1997  61.1  61  0.1 
Oct. 1997  49.9  49.5  0.4 
Nov. 1997  35.6  38  -2.4 
Dec. 1997  31.1  27.1 
Jan. 1998  29.6  21.8  7.8 
Feb. 1998  34.1  23.7  10.4 
Mar. 1998  36.1  34.1 
April 1998  48.6  46  2.6 
May 1998  64.3  57.5  6.8 
June 1998  67.4  67  0.4 
July 1998  72.2  71.6  0.6 
Aug. 1998  72.2  69.5  2.7 
Sept. 1998  66  61 
Oct. 1998  52.7  49.5  3.2 
Nov. 1998  42.1  38  4.1 
Dec. 1998  33.3  27.1  6.2 
Jan. 1999  21.2  21.8  -0.6 
Feb. 1999  31.4  23.7  7.7 
Mar. 1999  32.9  34.1  -1.2 
April 1999  48.8  46  2.8 
May 1999  61  57.5  3.5 
June 1999  69.4  67  2.4 
July 1999  74.7  71.6  3.1 
Aug. 1999  67.8  69.5  -1.7 
Sept. 1999  62.7  61  1.7 
Oct. 1999  49.5  49.5 
Nov. 1999  43.6  38  5.6 
Dec. 1999  30.4  27.1  3.3 
Jan. 2000  23.4  21.8  1.6 
Feb. 2000  31.4  23.7  7.7 
Mar. 2000  42.2  34.1  8.1 
April 2000  45.9  46  -0.1 
May 2000  59.6  57.5  2.1 
June 2000  66.1  67  -0.9 
July 2000  68.6  71.6  -3 
Aug. 2000 69.1 69.5 -0.4
Sept. 2000 60.4 61 -0.6
Oct. 2000 53.6 49.5 4.1
Nov. 2000 37.6 38 -0.4
Dec. 2000 19 27.1 -8.1
Jan. 2001 25.5 21.8 3.7
Feb. 2001 25.9 23.7 2.2
Mar. 2001 32.5 34.1 -1.6
Apr. 2001 50 46 4
May 2001 59.6 57.5 2.1
June 2001 66.3 67 -0.7
July 2001 71.3 71.6 -0.3
Aug. 2001 71.6 69.5 2.1
Sept. 2001 59.2 61 -1.8
Oct. 2001 50.3 49.5 0.8
Nov. 2001 46.8 38 8.8
Dec. 2001 33.9 27.1 6.8
Jan. 2002 30.2 22.4 7.8
Feb. 2002 30.7 25 5.7
Mar. 2002 31 34.6 -3.6
Apr. 2002 47 46.3 0.7
May 2002 52.7 58.1 -5.4
June 2002 69.4 67.1 2.3
July 2002 74.9 71.4 3.5
Aug. 2002 70.4 69.4 1
Sept. 2002 65.6 61.3 4.3
Oct. 2002 47 49.9 -2.9
Nov. 2002 36.2 38.4 -2.2
Dec. 2002 28.2 27.6 0.6
Jan. 2003 19.1 22.4 -3.3
Feb. 2003 20 25 -5
Mar. 2003 33.3 34.6 -1.3
Apr. 2003 45.7 46.3 -0.6
May 2003 54.9 58.1 -3.2
June 2003 64.7 67.1 -2.4
July 2003 70.1 71.4 -1.3
Aug. 2003 71.2 69.4 1.8
Sept. 2003 61.3 61.3 0
Oct. 2003 48.9 49.9 -1
Nov. 2003 41.1 38.4 2.7
Dec. 2003 31.6 27.6 4
Jan. 2004 19.5 22.4 -2.9
Feb. 2004 25.7 25 0.7
Mar. 2004 39.3 34.6 4.7
Apr. 2004 49.9 46.3 3.6
May 2004 59.7 58.1 1.6
June 2004 66.3 67.1 -0.8
July 2004 70.5 71.4 -0.9
Aug. 2004 66.1 69.4 -3.3
Sept. 2004 65.5 61.3 4.2
Oct. 2004 50.5 49.9 0.6
Nov. 2004 40.4 38.4 2
Dec. 2004 27.9 27.6 0.3
Jan. 2005 21.7 22.4 -0.7
Feb. 2005 28.2 25 3.2
Mar. 2005 29.9 34.6 -4.7
Apr. 2005 50.6 46.3 4.3
May 2005 54.7 58.1 -3.4
June 2005 72.9 67.1 5.8
July 2005 72.8 71.4 1.4
Aug. 2005 72.2 69.4 2.8
Sept. 2005 66.7 61.3 5.4
Oct. 2005 52.7 49.9 2.8
Nov. 2005 40.5 38.4 2.1
Dec. 2005 25.8 27.6 -1.8
Jan. 2006 33.2 22.4 10.8
Feb. 2006 26.4 25 1.4
Mar. 2006 36.5 34.6 1.9
Apr. 2006 50.6 46.3 4.3
May 2006 58.2 58.1 0.1
June 2006 67.7 67.1 0.6
July 2006 74.7 71.4 3.3
Aug. 2006 71.2 69.4 1.8
Sept. 2006 60.1 61.3 -1.2
Oct. 2006 47.2 49.9 -2.7
Nov. 2006 41.3 38.4 2.9
Dec. 2006 35.2 27.6 7.6
Jan. 2007 27.3 22.4 4.9
Feb. 2007 18.7 25 -6.3
Mar. 2007 39.6 34.6 5
Apr. 2007 45.1 46.3 -1.2
May 2007 62.7 58.1 4.6
June 2007 70.6 67.1 3.5